/Engine/Source/Runtime/Core/Public/Templates/SharedPointerInternals.h
Assignment operator from an rvalue weak referencer object. If this counter was previously referencing an object, that reference will be released.
[FWeakReferencer](API\Runtime\Core\Templates\FWeakReferencer) & operator= ( [FWeakReferencer](API\Runtime\Core\Templates\FWeakReferencer) && InWeakReference )